Conditionally-sampled velocity and turbulence measurements in a spark ignition engine

Journal Article · Sat Dec 31 23:00:00 EST 1983 · Combust. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/00102208408923742· OSTI ID:6307123

Witze, P O; Martin, J K; Borgnakke, C

Laser Doppler velocimeter measurements have been made in a homogeneously-charged spark ignition engine. With ignition at the side wall of the disc-shaped combustion chamber, the fluid motion in the direction of flame propagation was measured at the center of the chamber. A simultaneous ionization probe measurement was used to identify the time of flame arrival at the velocimeter probe volume. Phase-averaged measurements recorded from many engine cycles were conditionally sampled according to flame arrival time. The results presented show an increase in the unburned gas turbulence from compression, and strongly suggest that cyclic variation in burn duration is caused by cyclic variation in the bulk turbulence intensity ahead of the flame. 22 references, 8 figures.

• Research Organization: Sandia National Labs., Livermore, CA
• OSTI ID: 6307123
• Journal Information: Combust. Sci. Technol.; (United States), Journal Name: Combust. Sci. Technol.; (United States) Vol. 36; ISSN CBSTB
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
AUTOMOTIVE FUELS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
ENGINES
FLAME PROPAGATION
FUEL ECONOMY
FUELS
HEAT ENGINES
IGNITION
INTERNAL COMBUSTION ENGINES
KINETICS
REACTION KINETICS
SPARK IGNITION ENGINES
TURBULENCE
VELOCITY